I dont't understand...I did not pay anything when I put the first name. Why do I have to buy one now?
Are we talking about the same thing? When I clicked on the "Update Primary Domain" I did get a message saying that it had been upgraded. I did receive an email with my new name...it just does not come up when I google it.
Does it take time for it to show up when someone googles it? I know my first name did not show up for awhile. It does show up now. Do I have to wait again for the new name to show up?
Thanks,
Alex

Do you want to change your blog from blognameA.wordpress.com to blognameB.wordpress.com? That is not possible with the click of a button. You cannot simply change blognames like that. You have to register a new blog B and then export everything from blog A and import into it blog B.http://support.wordpress.com/export/